Connected: An Internet Encyclopedia
RFC 1421 - 4.6.1 Per-Message Encapsulated Header Fields

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### 4.6.1 Per-Message Encapsulated Header Fields

This group of encapsulated header fields contains fields which occur no more than once in a PEM message, generally preceding all other encapsulated header fields.

4.6.1.1 Proc-Type Field

4.6.1.1.1 ENCRYPTED
4.6.1.1.2 MIC-ONLY
4.6.1.1.3 MIC-CLEAR
4.6.1.1.4 CRL

4.6.1.2 Content-Domain Field
4.6.1.3 DEK-Info Field

Next: 4.6.1.1 Proc-Type Field

Connected: An Internet Encyclopedia
RFC 1421 - 4.6.1 Per-Message Encapsulated Header Fields